Where is the table..? You didn't provide any pictures..
The answer would be 58 degrees. You have to add the measure of R and P, and since a triangle is a total of 180 degrees, you subtract the sum and R and P from 180 and get your answer. Hope this helps!
There are 128 ounces in 1 gallon. 128 divided by 3 is 42.6 (the six repeats). so therefore you are adding 42.6 ounces of cleaning solution to 85.3 ounces of water